I've been reading this forum for a while. I currently have a mid 2010 MBP that has been very good to me over the years. But since I went into photography (www.m7m.photo) 2-3 years, the last year or so it has been a struggle to work on the little thing, thing just chokes now and space on the HDD is really running low. Was planning on getting the iMac (3.3 GHz, 2TB Fusion and R9 M395) this month, but then I read this and now I'm in doubt. is there going to be a big difference in performance with the new GPUs, and when is the expected iMac update? if the difference is just going to be slight for most of work I do (planning on getting into video as well). Like just a savings minutes of rendering or something then it might not be worth the weight, as working on my MBP has put off photography a little bit as its too slow now.